IEEE Photonics Technology Letters · 2005 · 17 citations · 6 references
EngineeringElectrical EngineeringAnalog ElectronicsInstrumentationOptoelectronicsFiber-optic CommunicationOptical AmplifiersOptical Communication SystemsOptical InstrumentationOptical Signal ProcessingSystem MonitoringIntegrated Optical AmplifiersOnline MonitoringOptical NetworkingOptical Transmission SystemsReflectometrySemiconductor Optical AmplifiersTime-domain ReflectometryWavelength-division Multiplexing
A semiconductor optical amplifier (SOA)-based optical time-domain reflectometry (OTDR) monitoring system is successfully demonstrated for a 350-km wavelength-division-multiplexing (WDM) network operating at 1625 nm. The 1625-nm monitoring signal bypasses the amplifying stage for WDM signals and is amplified by an L-band SOA. No power penalty was observed in the 10-Gb/s WDM transmissions when the OTDR signal is on. This simple and low-cost system is an excellent candidate for the online monitoring of WDM transmission systems.
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